brushless 1/5 4wd conversion about to begin! couple questions.

[Ryu James]

Originally Posted by florianz

hey,

what about installing the front break at the front diff, like they did it at the rear diff of the lrp buggy:
http://www.hpi-shop.at/assets/own/13...eam_detail.jpg

third pic in 1st row


like that you can keep the motor where it is, keep the rear break at the center. you only need a long, stable pushrod, you probably need to drill a slot into that beatuiful steering-plate to have enough space for the disc, maybe a little slice in the chassis as well. and you need a mount for the diskbrake. it might be very thight, but I think it should work. just take an "outdrive" or diffcup which can hold that disc. dunno how to describe it, but it's not that difficult I think.

it should be lighter and cheaper then these baja/fg-aftermarket breaks. sure, they're cool, but also expensive and heavy.

I don't think you should run a heavy truck like this whith the breaks of the esc. first problem is, there are only a few esc's around for 10s and w. proportional car breaks. maybe a mgm (which I don't favor) or Lutach's esc.

if you go for a boat/plane esc, if they have a break, its like full break or not.
I have a plane esc in my buggy conversion, it's great (solid, smooth, reliable) but the breaks are just cr*p. well, kinda got used to it.
you could take the hobbywing pentium hv, it can handle up to 12s, add some caps, probably a fan, and that's it. the're quite solid and have a good throttle.

btw, I really like that truck!

florian

hey, thanks for the idea. that looks pretty good. i get the break kits soon. just ordered today. but when i do i will just have to play around and see what i come up with. i already have some very long push rods. if i mounted like this i could put one and the front and rear diffs, servo in center of chassis somewhere, and a long pushrod going to each brake from the servo. could work. technically i only need one with the locked center diff but i want to go with 2 for better stopping power. i know the baja conversion with only one disc gets burned up in a few minutes of running. takes a lot to slow down a 30 pound truck from 50mph.

[KaztheMinotaur]

They Integy and RAMTech brakes are mounted with 2 bolts...nice and simple.

[Ryu James]

Originally Posted by KaztheMinotaur

Yeah, I think so.

What size gear did you get? Is there room to get a bigger one? Let me know about drilling holes? I think we will be screwed if he can't drill into it...

LMK about the motor mount.

Are you sure about the brakes on the Hydra? I had one before and there was a brake option on the Castle Link.

PM me your email and I will send you pics of disc brakes on a Rampage.

so the 36t gear that i got is the same diameter as the stock bevel gear and fits perfect. however you could go larger for sure and get that 40t gear by just flipping the center diff mount upside down. this gives you another 3/8" of room off the chassis. you could maybe even make a 44t gear fit. i think the 40t is gonna be the ideal gear but we'll see how this one does.

dont know about drilling holes yet. the gear also needs to be milled out a bit. it is too thick and needs to have the center section made skinnier in order to mount up right. i hope they can pull it off otherwise its back to the drawing board and will just have to have SDP make a custom one.


here is my 37t spur that i am gonna have made to fit




here are some pics of the SDP gear.

[Ryu James]

is anyone familiar with these Navy esc's? this one sounds pretty good.

http://www.offshoreelectrics.com/pro...i-e046&cat=123

[nitrostarter]

The Etti's are extremely popular and well built! Lots of boaters use them with great results. The CS is pretty good as well.

[Ryu James]

Originally Posted by nitrostarter

The Etti's are extremely popular and well built! Lots of boaters use them with great results. The CS is pretty good as well.

do these esc's have brakes or not?

[KaztheMinotaur]

That gear is big. Seems like the whole thing could be thinned out,maybe 1/8, and then a smaller section out of the middle "counter sunk" where it botls to the locker.

Is that gear hardened?

[lincpimp]

Originally Posted by KaztheMinotaur

That gear is big. Seems like the whole thing could be thinned out,maybe 1/8, and then a smaller section out of the middle "counter sunk" where it botls to the locker.

Is that gear hardened?

The sdp gear will not be hardened. May be the only issue with it, depending on what pinion gear you plan to run. I would leave it full thickness, or only mill it down to match the teeth width on the rcm mod 1.5 pinions.

[KaztheMinotaur]

Yeah.

[Ryu James]

i am just gonna do like what you said Kaz and mill out the central area of the gear so that it sheds some weight and mounts up properly to the drive shaft but still is very wide. it is not hardened but i have to tell you it seems way stronger/harder than the gears that i have that are hardened. plus, there is a company here local that i could have harden it if needed but i dont think this gear is gonna have any issues. and acutually the rcm pinion is wider than this. the sdp gear is 10mm wide. i havent measure the rcm pinion but i would guess it is about 14mm wide.

[Jabe]

You realy need to get it hardened... its very easy to do if you have blowtorch, just heat it untill it starts to go from red to white then drop it in cold water and thats it.
You might want that spur last longer than pinion, so it should be hardened.
I have hardened HotRacing pinions and those last just long as other hardened.

[florianz]

Originally Posted by Ryu James

is anyone familiar with these Navy esc's? this one sounds pretty good.

http://www.offshoreelectrics.com/pro...i-e046&cat=123

I had an etti, but blowed it due to wrong gearing... the throttle curve was a bit strange to me, but I probably could have played a bit more w/ the settings.

as far as I remember, the breaks were similar to my plane esc's in my buggy, break automatically when throttle is in neutral position. I think, compared to my plane esc the breaks were more instantly. I guess, they're well manufactured. but it got warm. they claim to have high quality and ultra low restistance stuff, but it didn't stay cooler than the plane esc.

those breaks are not a permanent solution; I had the 200a plane esc as a short term thing (which became permanent). modded w/ some caps and a fan very solid, good throttle etc, but the breaks just suck, when you don't keep the mechanical breaks.

to be honest, in every day use, I don't see any better performance then my cheapo-plane esc (200a, looks like a suppo, dunno if it's one).

about the hardening, take it to the local shop to get it done properly, it's not that easy. they should do that for a few bucks, regarding how expensive this hobby is, its worth it. go with the pro.

Hi mate,

Great thread! I've been wanting to convert my 5B for ages, but the motor mount is the biggest issue for me :(.

Anyway, with regard to looking for a digital servo, is it for steering or brakes or both? I run one of these for my steering and it's been bulletproof.

Multiplex Rhino Digi 4

Even when the steering linkage or servo saver gets jammed up with mud and stuff, servo keeps going.

[Ryu James]

Originally Posted by cdis

Hi mate,

Great thread! I've been wanting to convert my 5B for ages, but the motor mount is the biggest issue for me :(.

Anyway, with regard to looking for a digital servo, is it for steering or brakes or both? I run one of these for my steering and it's been bulletproof.

Multiplex Rhino Digi 4

Even when the steering linkage or servo saver gets jammed up with mud and stuff, servo keeps going.

wow, that servo is fast. so 200oz is enough huh? i hear lots of good things about the rhino. is it large size or regular sized spline? and do they make HD alum. servo arms for it somewhere?

[Ryu James]

Originally Posted by Jabe

You realy need to get it hardened... its very easy to do if you have blowtorch, just heat it untill it starts to go from red to white then drop it in cold water and thats it.
You might want that spur last longer than pinion, so it should be hardened.
I have hardened HotRacing pinions and those last just long as other hardened.

i dont think i have a torch that would turn this gear red. what kind of gas?